| 摘要 |
PROBLEM TO BE SOLVED: To provide a washing-degree checking method using a washing checking indicator, which can easily and surely carry out a quantitative measurement of a washing effect. SOLUTION: The washing-degree checking method which checks a degree of washing an object under treatment by using the washing checks indicator, wherein a sensing layer made of a pseudo contaminant is formed on a substrate, comprises: the first step (1) of disposing the washing checking indicator under an atmosphere in which the washing process using a washing liquid is carried out, before washing the object under treatment; and the second step (2) of measuring a color difference (ΔE*ab) between a post-staining sensing layer and a pre-washing sensing layer or a substrate surface, after staining the sensing layer processed in the first step, by using an acid stain. COPYRIGHT: (C)2009,JPO&INPIT
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